1.没玩过紫不清楚
2.这样很明显是违背游戏设计的
3.没错

1.可以。后续如果购买需要花1经验。

基础规则中组建牌组规则第9条：During a campaign, players build a deck before playing the first scenario. In between scenarios, players can purchase new cards or upgrade cards in their deck following the rules found under "Campaign Play" on page 5.
开始一个campaign时，第一个scenario时是build牌组，而scenario之间才是purchase牌。而Arcane Research的规则是When you purchase Arcane Research，build能叫purchase吗？

1.组那张牌就必须减神智上限（注意不是掉san，是减神智的上限）